ANALISIS RESPONS STRUKTUR SISTEM RANGKA PEMIKUL MOMEN KHUSUS DENGAN GEMPA DINAMIK RESPONS SPEKTRUM MENGGUNAKAN SAP2000

Abstrak

Indonesia is one of the countries located on the Pacific Ring of Fire, making it highly vulnerable to
earthquakes. This condition requires that the design of building structures comply with seismic code
provisions to ensure ductile behavior and safety under earthquake loads. One of the structural
systems recommended for regions with high seismic design categories is the Special Moment
Resisting Frame (SMRF), due to its high ductility capacity and effectiveness in dissipating seismic
energy. This study aims to analyze the structural response of a building using the SMRF system under
dynamic earthquake loading through the response spectrum method based on SNI 1726:2019. The
analysis was carried out using SAP2000 software, with spectral response parameters (Ss, S1, Fa,
Fv, SMS, SM1, SDS, and SD1) determined to classify the seismic design category. The building
structure was then modeled under response spectrum earthquake loading to evaluate its behavior in
terms of displacement, inter-story drift, base shear, and fundamental period. The analysis results
indicate that SDS > 0.5 g and SD1 > 0.2 g, placing the building in Seismic Design Category D. The
SMRF structural model meets the requirements of SNI 1726:2019, with inter-story drifts remaining
below the maximum limit of 2%, while the base shear and fundamental period comply with code
provisions. Therefore, the application of the SMRF system is considered feasible and suitable for
building structures located in high seismic risk regions.